Commands to setup working environment before build and execute stage. This may include environment variable
settings for compilers, tools, source paths, etc.
For Windows example
set PATH=c:\SEGGER\j-link\bin;%PATH%
set PLATFORM_SRC_BASE=.\platform\src
For Unix/Linux example
export PATH=/usr/local/open-ocd/bin:$PATH
export PLATFORM_SRC_BASE=./platform/src